Your question is Backpropagation and Gradient Issues. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Walk me through the mechanics of backpropagation in a multi-layer perceptron. How do vanishing and exploding gradients occur, and how do you mitigate them?